Monitoring St. 05 - NORTHERN CROSS RADIOTELESCOPE From Medicina
(IT - Bologna), N Italy
Induction coil, 6174281 event marked with white arrow.
Schumann Resonances on left part. Two strong wide band noises of
local origins precedes the earthquake: they might look like
precursors but they are not, and we will see later the reason.
Wind shakes the coil after 10:00 but no other RF signals appears
to be correlated with earthquake event.

Monitoring St. 05 - NORTHERN CROSS RADIOTELESCOPE From
Medicina (IT - Bologna), N Italy Induction coil, hourly strips, 6174281 event
marked with white arrow. Schumann Resonances on left part. The
same two strong wide band noises of local origins precedes the
earthquake. Wind shakes the coil after 10:00 but no others RF
signals appear to be correlated with earthquake event.

Here below the first reason because we
know that those strange wide bands of noise doesn't come from
earthquake area but their origin is pretty local. Let's go to
analyse with Sonic Visualizer the first source file, those one
coming from NORTHERN
CROSS RADIOTELESCOPE From Medicina. The file contains
geophone trace and induction coil signal.
Monitoring St. 05 - NORTHERN CROSS
RADIOTELESCOPE From Medicina (IT - Bologna),
N Italy 6174281
event is marked with vertical red line. Wide
band noise are evidenced with green tone,
inside the red dotted rectangle. They find a
match on geophone reception! It means that the
signal was originated very close to the
monitoring location. On the geophone reception
also a cyclical traces appear, first of the strange signal.
In all probability they belong to an
agricultural vehicle: he is doing the work in
the neighboring land.

But to have a confirm for this let's see what
has been received by Sogliano station, which it is located just 75 km
farther. In accordance with the known theories
of the propagation at very low frequencies
(see the explanation in the chapter where we
talk of radio seismic index) if the broadband
noise had its origin in the earthquake
area, Sogliano Station will receive the same
signal of Medicine, but attenuated by 11 dB.
Let's see what happens instead.

Monitoring St. 04 -
ROMAGNA OBSERVATORY From Sogliano al Rubicone (FC), N
Italy.
Induction coil, 6174281 event marked with white
arrow. Schumann Resonances marked on right part. No
evidence of the noise received from the station of
Medicine, a sure sign that its origin is not in the
earthquake. Another strange noise that begins shortly
before the earthquake and continues even after, it also
locally sourced. No RF signals correlated with earthquake
event.